Help !

My brothers girlfriend purchased a "Rent-to-own" laptop and missed a payment, They locked her pc with an unknown tool.

System Restore dosn't remove it
Win+R ( Re-starts the PC)
Safemode displays the same screen.
Alt Tab dosn't work,

I've searched around online and can't find anything.
Please help.

It also states " Attempting to bypass or reactive this machine without the proper password may result in damage to your system and loss of data "